3 * Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com>
5 * Solarize - curve adjustment video effect.
6 * Based on Pete Warden's FreeFrame plugin with the same name.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
26 * Alternatively, the contents of this file may be used under the
27 * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
28 * which case the following provisions apply instead of the ones
31 * This library is free software; you can redistribute it and/or
32 * modify it under the terms of the GNU Library General Public
33 * License as published by the Free Software Foundation; either
34 * version 2 of the License, or (at your option) any later version.
36 * This library is distributed in the hope that it will be useful,
37 * but WITHOUT ANY WARRANTY; without even the implied warranty of
38 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
39 * Library General Public License for more details.
41 * You should have received a copy of the GNU Library General Public
42 * License along with this library; if not, write to the
43 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
44 * Boston, MA 02111-1307, USA.
48 * SECTION:element-solarize
50 * Solarize does a smart inverse in a video stream in realtime.
53 * <title>Example launch line</title>
55 * gst-launch -v videotestsrc ! solarize ! ffmpegcolorspace ! autovideosink
56 * ]| This pipeline shows the effect of solarize on a test stream
67 #include "gstplugin.h"
68 #include "gstsolarize.h"
70 #include <gst/video/video.h>
71 #include <gst/controller/gstcontroller.h>
73 GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
74 #define GST_CAT_DEFAULT gst_solarize_debug
76 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
77 #define CAPS_STR GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_RGBx
79 #define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR
82 /* Filter signals and args. */
96 static gint gate_int (gint value, gint min, gint max);
97 static void transform (guint32 * src, guint32 * dest, gint video_area);
99 /* The capabilities of the inputs and outputs. */
101 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
104 GST_STATIC_CAPS (CAPS_STR)
107 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
110 GST_STATIC_CAPS (CAPS_STR)
113 GST_BOILERPLATE (GstSolarize, gst_solarize, GstVideoFilter,
114 GST_TYPE_VIDEO_FILTER);
116 static void gst_solarize_set_property (GObject * object, guint prop_id,
117 const GValue * value, GParamSpec * pspec);
118 static void gst_solarize_get_property (GObject * object, guint prop_id,
119 GValue * value, GParamSpec * pspec);
121 static gboolean gst_solarize_set_caps (GstBaseTransform * btrans,
122 GstCaps * incaps, GstCaps * outcaps);
123 static GstFlowReturn gst_solarize_transform (GstBaseTransform * btrans,
124 GstBuffer * in_buf, GstBuffer * out_buf);
126 /* GObject vmethod implementations */
129 gst_solarize_base_init (gpointer gclass)
131 GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
133 gst_element_class_set_details_simple (element_class,
135 "Filter/Effect/Video",
136 "Solarize tunable inverse in the video signal.",
137 "Luis de Bethencourt <luis@debethencourt.com>");
139 gst_element_class_add_pad_template (element_class,
140 gst_static_pad_template_get (&src_factory));
141 gst_element_class_add_pad_template (element_class,
142 gst_static_pad_template_get (&sink_factory));
145 /* Initialize the solarize's class. */
147 gst_solarize_class_init (GstSolarizeClass * klass)
149 GObjectClass *gobject_class = (GObjectClass *) klass;
150 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
152 gobject_class->set_property = gst_solarize_set_property;
153 gobject_class->get_property = gst_solarize_get_property;
155 g_object_class_install_property (gobject_class, PROP_SILENT,
156 g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
157 FALSE, G_PARAM_READWRITE));
159 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_solarize_set_caps);
160 trans_class->transform = GST_DEBUG_FUNCPTR (gst_solarize_transform);
163 /* Initialize the new element,
164 * instantiate pads and add them to element,
165 * set pad calback functions, and
166 * initialize instance structure.
169 gst_solarize_init (GstSolarize * filter, GstSolarizeClass * gclass)
171 filter->silent = FALSE;
175 gst_solarize_set_property (GObject * object, guint prop_id,
176 const GValue * value, GParamSpec * pspec)
178 GstSolarize *filter = GST_SOLARIZE (object);
182 filter->silent = g_value_get_boolean (value);
185 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
191 gst_solarize_get_property (GObject * object, guint prop_id,
192 GValue * value, GParamSpec * pspec)
194 GstSolarize *filter = GST_SOLARIZE (object);
198 g_value_set_boolean (value, filter->silent);
201 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
206 /* GstElement vmethod implementations */
208 /* Handle the link with other elements. */
210 gst_solarize_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
213 GstSolarize *filter = GST_SOLARIZE (btrans);
214 GstStructure *structure;
217 structure = gst_caps_get_structure (incaps, 0);
218 ret &= gst_structure_get_int (structure, "width", &filter->width);
219 ret &= gst_structure_get_int (structure, "height", &filter->height);
224 /* Actual processing. */
226 gst_solarize_transform (GstBaseTransform * btrans,
227 GstBuffer * in_buf, GstBuffer * out_buf)
229 GstSolarize *filter = GST_SOLARIZE (btrans);
231 guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf);
232 guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf);
234 video_size = filter->width * filter->height;
236 transform (src, dest, video_size);
241 /* Entry point to initialize the plug-in.
242 * Register the element factories and other features. */
244 gst_solarize_plugin_init (GstPlugin * solarize)
246 /* debug category for fltering log messages */
247 GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
248 0, "Template solarize");
250 return gst_element_register (solarize, "solarize", GST_RANK_NONE,
254 /*** Now the image processing work.... ***/
256 /* Keep the values inbounds. */
258 gate_int (gint value, gint min, gint max)
262 } else if (value > max) {
269 /* Transform processes each frame. */
271 transform (guint32 * src, guint32 * dest, gint video_area)
276 gint threshold = 127;
282 gint period, up_length, down_length, height_scale, param;
284 period = end - start;
289 up_length = threshold - start;
290 if (up_length == 0) {
294 down_length = end - threshold;
295 if (down_length == 0) {
299 height_scale = ceiling - floor;
301 /* Loop through pixels. */
302 for (x = 0; x < video_area; x++) {
305 color[0] = (in >> 16) & 0xff;
306 color[1] = (in >> 8) & 0xff;
307 color[2] = (in) & 0xff;
309 /* Loop through colors. */
310 for (c = 0; c < 3; c++) {
316 if (param < up_length) {
317 color[c] = param * height_scale;
318 color[c] /= up_length;
321 color[c] = down_length - (param - up_length);
322 color[c] *= height_scale;
323 color[c] /= down_length;
328 color[0] = gate_int (color[0], 0, 255);
329 color[1] = gate_int (color[1], 0, 255);
330 color[2] = gate_int (color[2], 0, 255);
332 *dest++ = (color[0] << 16) | (color[1] << 8) | color[2];